Pulp-press.



A. WERTENBRUCH.

PULP PRESS. APPLICATION msu Anna. wia.

Patented Apr. 8, 1919.

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WTE@ STATES IDATENT FFTEQ YANTONY WERTENBRUCH, OF DETROIT, MICHIGAN,ASSIGNOR TO THE LARROWE CONSTRUCTION COMPANY, OF DETROIT, MICHIGAN, ACORPORATION LOF MICHIGAN. f PULP-PRESS.

1,299,524.' Specification 0f Letters Patent. Patented Apr. S,-1919Application1edAprii1s,`191s. seriaineaaaass,

To @ZZ whom t may concern.'

Be /it known that I, ANTONY WERTEN- rRUoH, formerly ya subject of theEmperor of Germany, having taken out irst citizenship papers of theUnited States of America, and residing at Detroit, in the county ofVayne and State of Michigan, have invented certain new and usefulImprovements in Pulp-Presses, of which the followingis a specification,reference being had therein to the accompanying drawings. 4

The invention relates to apparatus for the extraction of moisture frompulp and of that type in which the pulp to b e pressed is fed through atapering or varying passage having screened sides. More particularly theinvention relates to presses comprising a rotating' hollow worm memberhaving a `screened surface and a concentric surrounding stationaryscreen, the annular passage between said members being progressivelycontracted from one end to the other.

With constructions such as described it has been customary to providemeans for variably restricting the outlet for the pulp, this beingaccomplished by an annular member of wedge-shaped cross-section lyingadjacent to one of the walls `and adjustable in the throat or outlet forthe pulp. Thus by adjusting this member the opening may be contracted orenlarged so as to offer greater or less resistance to the pulp andconsequently to apply a correspondingly varying pressure thereto. It hasbeen customary, however, to arrange this adjustable member adjacent toone of the screen surfaces so that during adjustment it will cover to agreater or less extent the perforations of the screen. This isobjectionable inasmuch as the only escape for the moisture contained inthe pulp is through the contacting screens and therefore the eiciency isout down in proportion to the extent the screen is shielded. The presentconstruction is designed to avoid this defect and consists in means forvariably contracting the throat or discharge opening without in any waycovering the screen surface. More specifically it consists in an annularmember of wedge-shaped cross-section which is spaced from both the outerand inner screened surfaces and is adjustable inward and outward inrelation to the discharge opening.,

In the drawings, a. 4portion of the pressV is represented inlongitudinal section showing the restricting means in differentpositions of adjustmentl respectively in full and dotted lines.

A A is the stationary outer casing having an inner screen wall B, and Cis the rotating inner member having the screen surface D and the spiralblades E. The surface D iares from the upper to the lower end so as toform a progressively contracting space between the inne-r and outerscreens and at the lower end there is a tapering section F of the outerscreen for forming a contracted throat or discharge opening. The memberC is hollow and at its lower end is provided with a hollow trunnion Gwhich is journaled in a suitable bearing such as I-I at the base of thepress.

I is an annular member arranged beneath the discharge passage or throatand preferably substantially midway between the outer and inner screenedsurfaces. This member I is of van upwardly-tapering cross-section and inits lowest position of adjustment forms no restriction to the area ofthe dis.

chai'gc opening. If, however, the member I is adjusted upward it willprogressively contr-act or obstruct the opening so as to produce anydesired restriction to the outlet of the pulp. This adjustment ispreferably eii'ected by suspending the member I from the outer casing,as by means of the studs J, and nuts K engaging said studs will adjustthe member into different positions. In each position of adjustment themember I is spaced from both the outer and innery screens and thereforethere will be n0 shielding or obstructing of the screen surfaces.

What I claim as my invention is:

l. In a press, the combination with spaced non-parallel screens andmeans for forcing the material between said screens toward thecontracted end, of means spaced from said screens for variablyrestricting the throat or outlet therebetween.

2. In a press, the combination with spaced non-parallel screens andmeans for forcing the material therebetween toward the contracted end,of a member arranged intermediate said screens and spaced therefromhaving a wedge-shaped cross-section, and means for adjusting said memberinto and out of the throat between said screens,

3. In a press, the combination with a; ro-

tatingwornmmember having a screened sur- Wedge-shaped cross-sectionadjustable into and out from the throat between saidv screened members'and spaced ytherefromv to variably restrict the outlet for the material.

4. In a press, the combination with a` ro'- tary hollow wormhaving alscreened surface7 of a surrounclingl stationary member having as'creene'dj surface, an annular member secured to said stationary memberand of a wedge-shaped cross-section, and means for adjusting saidannular member into and out from the throat between said screenedsurfaces to Vary thevopen areathereof, said annular' member being spacedfrom the screened surfaces.

5. In a press, the combination with spaced screens, of means spaced fromand movable into the space between said screens for variablyrestricting' the space, and means for orclng the material between saidscreens toward said restricting means.

In testimony whereof I ailX my signature.

ANTONY WERTENBRUCH.

Wshingtm Di C.

